Evolution and phylogenetic relationships of Senegalese populations of Caryedon serratus (Olivier, 1790) between 1998 and 2022

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Research Paper 10/09/2024
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Evolution and phylogenetic relationships of Senegalese populations of Caryedon serratus (Olivier, 1790) between 1998 and 2022

Serigne Diouf, Mamadou Lo, Toffène Diome, Mama Racky Ndiaye, Cheikh Thiaw, Mbacké Sembène
Int. J. Biosci.25( 3), 248-260, September 2024.
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Abstract

Groundnuts are an important food resource in Senegal, but post-harvest losses of this product are considerable and represent a major economic constraint for our country. Most often, these losses are due to beetles (pests) and among these, the one that causes the most damage to the stocks belongs to the Chrysomelidae family : Caryedon serratus, commonly known as groundnut seed-beetle. Faced with these losses, it is becoming urgent to look for new methods of control. The objective of this research is therefore to study the evolution and phylogenetic relationships of Senegalese populations of C. serratus associated with groundnuts (Arachis hypogaea) and wild host plants (Piliostigma reticulatum, Tamarindus indica, Bauhinia rufescens and Cassia sieberiana) between 1998 and 2022. For this, the Cytochrome B (Cyt-B) gene of different strains of C. serratus was sequenced. The results of demographic evolution suggests that, overall, populations of C. serratus may have originated from a stable ancestral population with a long evolutionary history. The network and phylogenetic trees reveal genetic affinities and proximity that result in gene flow between groundnut-infesting seed-beetles and those from Cassia sieberiana, meaning that the C. sieberiana was the source of the groundnut infestation in 2022.

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